DOSTROL Control system for contact-operated metering pumps Housing: Surface mounted housing. Material: glass fiber-reinforced Noryl. Min. installation depth: 280 mm w/ PH value measuring module, otherwise 260 mm, 2-line LC display, 16-digit, permanently illuminated. Electrical connection: 230 V, 50/60 Hz, IP 65. Functions: Internal control 0..150 strokes/min., external control by contacts w/ pulse multiplication & division at ratios of 1 to 999, external control by continuous 0..20 mA, 4..20 mA, 0..10 V & 2..10 V signals, batch metering, warning alarm relay for collective alarms-action principle of the relay can be inversed, connection for level control w/ alarm signaling, connection for remote switchoff, slot for measuring module for extended usage as P, PI, PID controller.